超/高超声速飞行器动态稳定性导数极快速预测方法研究

  • 李正洲 ,
  • 高昌 ,
  • 肖天航 ,
  • 马志成 ,
  • 肖济良 ,
  • 朱建辉
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  • 1. 中国空气动力研究与发展中心
    2. 南京航空航天大学航空宇航学院
    3. 南京航空航天大学

收稿日期: 2019-10-08

  修回日期: 2019-11-19

  网络出版日期: 2019-11-28

基金资助

高超声速超燃冲压发动机技术重点实验室基金

Research on extremely efficient prediction technique of dynamic stability derivatives for high-speed flight vehicles

  • LI Zheng-Zhou ,
  • GAO Chang ,
  • XIAO Tian-Hang ,
  • MA Zhi-Cheng ,
  • XIAO Ji-Liang ,
  • ZHU Jian-Hui
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Received date: 2019-10-08

  Revised date: 2019-11-19

  Online published: 2019-11-28

Supported by

Foundation of Science and Technology on Screamjet Laboratory

摘要

飞行器设计早期阶段需要预测大量工况下的动态稳定性参数。发展了一种面向高速飞行器的动导数高效预测方法:首先基于当地流活塞理论,将高速飞行器进行小幅非定常运动所受气动力分为①受自由来流引起的无附加扰动项以及②受物面变形或运动引起的附加扰动项;通过当地表面斜度法、激波后等熵关系求解物面当地流动参数,进而结合非定常运动规律求出飞行器所受非定常气动力;最后采用待定系数法对非定常气动力进行提取、辨识,最终得到飞行器动导数。该方法克服了传统方法对CFD流场参数的依赖和耦合,因此具有极高的计算效率;同时典型算例验证表明,该方法在超声速、高超声速工况下都能够很好预测动导数变化趋势。文章最后成功地将该方法应用于复杂外形飞行器动导数预测,并讨论了与CFD方法的误差来源。本文方法可作为高速飞行器总体设计阶段布局选型的工具。

本文引用格式

李正洲 , 高昌 , 肖天航 , 马志成 , 肖济良 , 朱建辉 . 超/高超声速飞行器动态稳定性导数极快速预测方法研究[J]. 航空学报, 0 : 0 -0 . DOI: 10.7527/S1000-6893.2019.123545

Abstract

In the early stage of aircraft design, it is necessary to predict the dynamic stability derivatives under a large number of operating conditions. An extremely efficient prediction technique of dynamic stability derivatives for high-speed flight vehicles is developed in this paper. Firstly, the unsteady aerodynamics of high-speed flight vehicles can be divided into non-disturbance aerodynamic component and disturbance aerodynamic component, based on the local piston theory; Secondly, the local surface inclination method, together with the isentropic flow relation after a shock wave are employed to solve the surface flow veriables, and then the unsteady aerodynamic forces are calculated by combining the unsteady motion; finally, the dynamic derivatives are extracted and identified from unsteady aerodynamic forces with by the undetermined coefficient method. Our method eliminates the time-consuming of traditional CFD method, which is dependent and coupled with numerical simulation flow field variables. Typical test cases indicate that our method can predict the trend of dynamic derivatives well under both supersonic and hypersonic conditions. At last, ourmethod is successfully applied to dynamic derivatives prediction of flight vehicles with complex shape, and the error sources with CFD method are discussed. The effieicnt dynamic derivatives prediction technique in this paper can be used to screen layout of high-speed flight in conceptual design stage.

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